Just remember that the Path of Valor Valor Challenge to do with the Challenge Events has 3 tiers to it:
Tier I = Complete 1 Challenge Event
Tier II = Complete 2 Challenge Events
Tier III = Complete 3 Challenge Events
SO; if you completed one stage (say Epic) you would have completed Tier 1. If you completed all 3 stages (epic, rare & legendary) you will have completed Tier 1 & 2.
Just check that when you say “I haven’t gotten credit” that you have not rolled over to the next tier & just accidentally/ not payed attention when you collected the “Valor Points”.